It's probably fine. They do sometimes flower, and the flower can mean neglect. The snake plant thrives on neglect, however, and from what I can see, yours looks OK right now.

Flowering can be a signal from the plant that it thinks it's about to up and die from something, like drought, and that it's time to send seeds before that happens. So check around. If it's getting good bright indirect light, that's perfect and needed for flowering. If you don't see any disease or pest symptoms (rare but not unheard-of--mealy bugs and spider mites), it's time to look at the watering habits.

If maybe you're not watering when the soil is fully dried out (usually, with a very gritty mix, about once a week, less often with heavier mixes), step up the watering a little. I can't see, but your mix looks a bit heavier. Certainly make sure the first inch is fully dried out before watering. Deeper if possible, without disturbing roots.

You can keep and enjoy that flower if you want, but prune it off when it dies so the plant doesn't expend the energy to form seeds.

My mother had a snake plant she often forgot to water for periods of up to three months at a time. It...well, managed is the word, I suppose. The only way to compensate there was to put it in a heavier soil that held far more water. Not recommended, but the only way to get it to have any lifespan in that household...

Thank you!